Page 317 - ICSE Math 7

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3. (a) (b) 1 (c) 5 (d) 1 9. Reflection in x-axis = (3, 5); Reflection in y-axis = (–3, –5)
6 36 12 2 11. 11 12. 135° 13. 57°
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1
1
4. (a) (b) (c) (d) 1 Self-Testing Exercise 5
8 2 4 2
1 1 1. 17 m 2. (a) ` 1,44,000 (b) ` 10,120 3. 14 m
5. (a) (b) (c) 0 (d) 1 2 2 2
3 2 4. 152 m 5. 48 cm; 70 cm 6. 724 cm 7. 8 cm
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2
4
1
4
6. (a) (b) 1 (c) (d) 7. (a) 13 (b) 17 8. 28 cm; 2,464 cm 9. 7 cm 10. 50 cm 11. 49 cm
9 36 9 9 25 50 12. 98.56 cm 2
Think Smart Self-Testing Exercise 6
3 4 6 1
2. (a) (b) (c) (d) (e) 1 (f) 0 1. No. of children Tally marks Frequency
13 13 13 13
1
1
3. (a) (b) (c) 1 1 5
9 4 2 2 8
Self-Testing Exercises 3 4
4 2
Self-Testing Exercise 1 5 1
3
1. 11 > 13 > > 9 2. (a) 583 (b) 153 Total = 20
14 28 7 35
–20 19 135 –432 2. 7.8 3. 9.5, 9.3, 8.3, 8.1, 7.5, 7.5, 6.6, 6.6, 6.4, 4.3
3. (a) (b) 4. (a) 1 (b) (c) 1 5.
57 15 32 245 4. (a) 40 kg (b) 39 kg and 44 kg
6. (a) 192 (b) 243 (c) 27 (d) a 3 7. 7.65 × 10 –4 5. (a) The graph shows the favourite subject of students.
4a 49b (b) Hindi (c) Mathematics (d) 35
8. n = 12 9. (a) –147.9 (b) 5 1 6.
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10. (a) 16 (b) 16.4 (c) 16.35 (d) 16.355 11. (a) 5 (b) 7 800
12. f, {7}, {11}, {13}, {7, 11}, {11, 13}, {13, 11} and 700
{7, 11, 13} 13. 45 600

Self-Testing Exercise 2 500
1. ` 75,000; ` 1,25,000 2. 72 3. X : 240; Y : 160; Z : 120 Consumption (in g) 400
4. 9 bags 5. 800 6. 90,000 sq.m 7. ` 20,000 300
–1
8. 54 km h 9. 15% 10. 1% loss 11. ` 2,25,000 200
12. 3 years 13. 2% per annum 14. ` 1,296 15. ` 4,200 100 January February March April May
16. 15 0
Months
Self-Testing Exercise 3
3
2
1
2
2
2
1. (a) 6 (b) 10 2. 6x + x – 6 3. –10a + 30a + 21 7. (a) (b) 12 (c) 27 8. (a) (b) (c) (d) 1
22 –5 2 9 5 2 7 35 35 2 3 3 2
4. (a) a (b) –3x + 9y + 3z 5. x + xy + y Question Bank
15 3 2 2
6. 4,19,904 7. 68 8. 80; 32 9. a + 3 10. x = 3 True or False
a – 3
2
11. ` 30 12. {8, 9} 13. 35 cm; 43 cm 14. 5x + 6x + 2 1. True 2. False 3. False 4. False 5. False
15. x ≤ 6 6. True 7. True 8. True 9. False 10. True
11. True 12. True 13. False 14. True 15. True
16. False 17. False 18. False 19. True 20. False
–2 –1 0 1 2 3 4 5 6 7
21. False 22. False 23. False 24. True 25. False
16. {0, 1, 2, 3, 4} 17. 33, 34, 35 26. True 27. True 28. False 29. True 30. True
Self-Testing Exercise 4 31. True 32. False 33. True 34. True 35. False
1. 64° 29' 36"; 154° 29' 36" 2. 40° 3. 150° 36. True 37. False 38. False 39. True 40. True
4. x = 55°; y = 55°; z = 125° 6. (a) 30° (b) 60° 41. True 42. False 43. True 44. True 45. True
8. 46. False
D C
Fill in the Blanks
1. positive 2. 0 3. reciprocal 4. proper 5. 5 6. 5
5
5
A B 7. terminating 8. 0 9. (7z) 10. 12 11. cardinality

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